Why is there such a big difference in rated heating area between the summit and the Blaze King. The fire box has very little difference in size but yet the blaze king is only rated at about half of the heating capacity of the summit. I am looking for responses for actual the actual square footage that is heated with both of these stoves and how well they have worked with temperatures consistently below 30 deg F. How hot were you able to keep the house etc and a little bit about the layout of the house. I have a PE Summit and am struggling to adequately heat less than 3000 sft. Any feedback is appreciated.